メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.419110640418 43.7507129873629, 142.419127710923 43.7509583835445, 142.419177965954 43.7513541294823, 142.417507374192 43.7514515686761, 142.415970454754 43.7515151444546, 142.415163519153 43.751566845568, 142.415162422841 43.7515519205967, 142.41509004073 43.751041404647, 142.41506041121 43.7505476334562, 142.415058556682 43.7505169774213, 142.415852698744 43.7504866733854, 142.415850164062 43.75046438488, 142.417387024454 43.7503889452865, 142.419063044696 43.7502875455144, 142.419110640418 43.7507129873629)) ^^http://www.opengis.net/ont/geosparql#wktLiteral